package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName: UserServiceImpl
 * @Package: com.sky.service.impl
 * @Author: 金磊
 * @CreateDate: 2025/4/14 - 18:21
 * @Version: V1.0.0
 * @Description:
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    /**
     * 微信登录接口地址
     */
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信用户登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用接口服务，获取当前微信用户的openid
        String openid = getOpenid(userLoginDTO.getCode());
        System.out.println(openid);
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if (openid == null) {
            //抛出业务异常
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否是新用户，如果是新用户，保存用户信息，自动完成注册
        User user = userMapper.getByOpenid(openid);
        if (user == null) {
            //新用户，保存用户信息，自动完成注册
            user = User.builder().openid(openid).build();

            userMapper.insert(user);
        }
        //如果不是新用户，直接返回用户信息

        return user;
    }

    /**
     * 调用接口服务，获取当前微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        //调用接口服务，获取当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid =jsonObject.getString("openid");
        return openid;
    }
}
